code: def pad(labs, n):
      if n == 0:
          return np.array(labs)
      return np.concatenate([[labs[0]] * n, labs, [labs[-1]] * n])
  
file_path: espnet/egs2/vctk/asr1/pyscripts/feats/measure_teacher_quality.py
imports: import argparse
  import re
  from collections import Counter
  import numpy
  from tabulate import tabulate
  from espnet2.utils.types import str2bool
label_desc: Use image node_id 5 for calling a global function with example usage: pad(labs, n) and returns: np, np